I don't know what other plans there are for MB v.3, but what could be slightly easier to implement would be something like what CCleaner (free) does.
An option to check for updates on program start and a popup telling you - hey, there's a newer version available - which, upon clicking it, would open you to the download page. Upon running the setup, it would remove/replace the older version, installing the newer one.
edit: look below.
The option is on for me.
I have to admit that I assumed that because people were asking for this so badly, there was nothing there. I didn't even think to check (as foolish as that might sound).
Thank you.